Publications

Kenji Itao. Evolutionary Human Sciences 8 e28 2026
A study identifying two universal pathways in demographic transition by analyzing changes in fertility and life expectancy across 237 countries and territories from 1800 to 2020.
Press release: RIKEN
Related coverage: Newsweek
Kenji Itao, Kunihiko Kaneko. Proceedings of the National Academy of Sciences 117.5 2020
A study on the emergence of kinship systems with specific rules—like “a son of the Sun should marry a daughter of the Moon” from a general interaction pattern in human societies: in-laws cooperate while mating rivals compete.